Introduction of holstein-friesian genes into the Black-pied population

International audienc

Randomised controlled trial of telemonitoring with addition of daily forced oscillation in older people with COPD and co-morbidity

Evidence of clinical benefit and cost-effectiveness from daily symptom and simple telemonitoring in COPD is unproven. The CHROMED study explored the effect of telemonitoring in older people with COPD and significant co-morbidity who performed daily forced oscillation measurements via RESMON PRO DIARY to identify early physiological change associated with an exacerbation. Six centres in 5 countries randomised 312 people to 9 months telemonitoring (154) or daily symptom questionnaires (158). Each day the monitored group recorded symptoms, pulse, BP, oxygen saturation and airway resistance and reactance. An alert was generated if results exceeded pre-determined parameters and the participant was contacted by their local clinical centre to consider additional treatment. Baseline characteristics were evenly matched: mean age 71 years, FEV1 1.3L (50% predicted) and SGRQ score 49. 61% of subjects had 2+ exacerbations and 42% had been hospitalised in the previous year. Time to first hospitalisation did not differ albeit the monitoring group had fewer hospitalisations (79 vs 103; p=ns) and days in hospital (329 vs. 650; p=ns). However, subjects hospitalized with an AE COPD in the previous year (n=128) had a lower hospitalisation rate (p<0.04). Quality of life (EQ-5D) and health status (CAT) did not differ between groups. Mean cost in the monitored group was marginally lower (€4,615 vs €4,831; p=ns). Telemonitoring including daily forced oscillation impacted neither time to first hospitalisation nor health status. Reduction in hospitalisation rate in subjects with previous hospitalisation suggests these individuals may benefit from telemonitoring and earlier treatment

Optical properties and plasmon – Two different phonons coupling in ZnGeAs2 + Mn

Optical properties of p-type Zn1−xMnxGeAs2 for 0 ⩽ x ⩽ 0.078 were investigated by Raman spectroscopy at room temperature. Phonons of ZnGeAs2 are experimentally determined and they are in excellent agreement with those theoretically predicted. Existence of MnAs clusters was confirmed in the sample with the highest concentration of Mn. MnAs was found in α and β phases and their vibrational frequencies are obtained experimentally. Plasmon – two different phonons interaction in Zn1−xMnxGeAs2 is registered and analyzed

Chalcopyrite semimagnetic semiconductors: From nanocomposite to homogeneous material

Currently, complex ferromagnetic semiconductor systems are of significant interest due to their potential applicability in spintronics. A key feature in order to use semiconductor materials in spintronics is the presence of room temperature ferromagnetism. This feature was recently observed and is intensively studied in several Mn-alloyed II-IV-V2 group diluted magnetic semiconductor systems. The paper reviews the origin of room temperature ferromagnetism in II-IV-V2 compounds. In view of our recent reports the room temperature ferromagnetism in Mn-alloyed chalcopyrite semiconductors with more than 5 molar % of Mn is due to the presence of MnAs clusters. The solubility of magnetic impurities in bulk II-IV-V2 materials is of the order of a few percent, depending on the alloy composition. High values of the conducting hole - Mn ion exchange constant Jpd have significant value equal to 0.75 eV for Zn0.997Mn0.003GeAs2. The sample quality has significant effect on the magnetotransport of the alloy. The magnetoresistance of the alloy change main physical mechanism from spin-disorder scattering and weak localization for homogeneous samples to cluster-related geometrical effect observed for nanocomposite samples. The magnetoresistance of the II-IV-V2 alloys can be then tuned up to a few hundreds of percent via changes of the chemical composition of the alloy as well as a degree of disorder present in a material. [Projekat Ministarstva nauke Republike Srbije, br. III45003

Spectroscopy characterization of MnSe nanoclasters randomly distributed in HgMnTe single crystal

New semimagnetic semiconductor Hg0.91Mn0.09Te-MnSe mixture, grown by Bridgman method, was investigate by Atomic Force Microscopy, X-ray and far-infrared spectroscopy, in order to obtain the necessary feedback information to determine the optimal conditions for crystal growth. The investigated mixture consists of MnSe nanoclasters randomly distributed in Hg0.91Mn0.09Te matrix. Far-infrared reflectivity spectrum of the Hg0.91Mn0.09Te-MnSe mixture was measured in the 80-500 cm(-1) range at a room temperature. The analysis of the far-infrared spectrum was made by the fitting procedure. The Maxwell-Garnett effective medium theory is used for modeling an effective dielectric function, and on that way calculating both electron and phonon response